dt-bindings: interrupt-controller: Add Aspeed SCU interrupt controller

Document the Aspeed SCU interrupt controller and add an include file
for the interrupts it provides.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/1579123790-6894-2-git-send-email-eajames@linux.ibm.com

diff --git a/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt b/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
new file mode 100644 (file)
index 0000000..251ed44
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
@@ -0,0 +1,23 @@
+Aspeed AST25XX and AST26XX SCU Interrupt Controller
+
+Required Properties:
+ - #interrupt-cells            : must be 1
+ - compatible                  : must be "aspeed,ast2500-scu-ic",
+                                 "aspeed,ast2600-scu-ic0" or
+                                 "aspeed,ast2600-scu-ic1"
+ - interrupts                  : interrupt from the parent controller
+ - interrupt-controller                : indicates that the controller receives and
+                                 fires new interrupts for child busses
+
+Example:
+
+    syscon@1e6e2000 {
+        ranges = <0 0x1e6e2000 0x1a8>;
+
+        scu_ic: interrupt-controller@18 {
+            #interrupt-cells = <1>;
+            compatible = "aspeed,ast2500-scu-ic";
+            interrupts = <21>;
+            interrupt-controller;
+        };
+    };

diff --git a/MAINTAINERS b/MAINTAINERS
index e09bd92..f9f6e40 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2692,6 +2692,13 @@ S:       Maintained
 F:     drivers/pinctrl/aspeed/
 F:     Documentation/devicetree/bindings/pinctrl/aspeed,*
 
+ASPEED SCU INTERRUPT CONTROLLER DRIVER
+M:     Eddie James <eajames@linux.ibm.com>
+L:     linux-aspeed@lists.ozlabs.org (moderated for non-subscribers)
+S:     Maintained
+F:     Documentation/devicetree/bindings/interrupt-controller/aspeed,ast2xxx-scu-ic.txt
+F:     include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
+
 ASPEED VIDEO ENGINE DRIVER
 M:     Eddie James <eajames@linux.ibm.com>
 L:     linux-media@vger.kernel.org

diff --git a/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h b/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
new file mode 100644 (file)
index 0000000..f315d5a
--- /dev/null
+++ b/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_
+#define _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_
+
+#define ASPEED_SCU_IC_VGA_CURSOR_CHANGE                        0
+#define ASPEED_SCU_IC_VGA_SCRATCH_REG_CHANGE           1
+
+#define ASPEED_AST2500_SCU_IC_PCIE_RESET_LO_TO_HI      2
+#define ASPEED_AST2500_SCU_IC_PCIE_RESET_HI_TO_LO      3
+#define ASPEED_AST2500_SCU_IC_LPC_RESET_LO_TO_HI       4
+#define ASPEED_AST2500_SCU_IC_LPC_RESET_HI_TO_LO       5
+#define ASPEED_AST2500_SCU_IC_ISSUE_MSI                        6
+
+#define ASPEED_AST2600_SCU_IC0_PCIE_PERST_LO_TO_HI     2
+#define ASPEED_AST2600_SCU_IC0_PCIE_PERST_HI_TO_LO     3
+#define ASPEED_AST2600_SCU_IC0_PCIE_RCRST_LO_TO_HI     4
+#define ASPEED_AST2600_SCU_IC0_PCIE_RCRST_HI_TO_LO     5
+
+#define ASPEED_AST2600_SCU_IC1_LPC_RESET_LO_TO_HI      0
+#define ASPEED_AST2600_SCU_IC1_LPC_RESET_HI_TO_LO      1
+
+#endif /* _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_ */